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Muscle Force Potentiation During Constant Electrical Stimulation - Dependence on Pulse-Amplitude and Pulse-Duration of Electrical Stimulation  

Kim, Ji-Won (건국대 의료생명대 의학공학부)
Kwang, Min-Young (건국대 의료생명대 의학공학부)
Eom, Gwang-Moon (건국대 의료생명대 의학공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.55, no.10, 2006 , pp. 458-463 More about this Journal
Abstract
The purpose of this work is to investigate the fundamental properties of the gradual muscle force potentiation. We investigated the dependence of force potentiation on both the pulse-amplitude and the pulse-duration with different ramp-up time. The experimental results showed that the force increment ratio (FIR) during constant electrical stimulation decreased with pulse-amplitude and also with pulse-duration. The FIR was greater with short ramp-up time in both the pulse-amplitude and pulse-width modulation. The feasible mechanism might be that the myosin light chain phosphorylation induces the force potentiation and it occurs only in the fast type muscle fibers which are recruited first. These observations indicate that muscle potentiation must be understood well for the accurate control of muscle force.
Keywords
Functional Electrical Stimulation; Muscle Force Potentiation; Stimulation Current; Pulse-Duration;
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